Day 1 of a phase 3 beta. If you think things were going to be less laggy then clearly you've never played a game on launch.
Start of each phase had its issues and most of those issues were either fixed or alleviated within a day or two. The real test will come at the end of phase 3 when the servers are left up for more than 3 days. After that then i would say it would be fair to judge the stability of the game's servers because then there won't be thousands trying to login to the same servers.